books.google.es - From planetary movements and the exploration of our solar system to black holes and dark matter, this comprehensive reference simplifies all aspects of astronomy with an approachable question-and-answer format. With chapters broken into various astronomical studies--including the universe, galaxies,...http://books.google.es/books/about/The_Handy_Astronomy_Answer_Book.html?id=U6_vNecVEy4C&utm_source=gb-gplus-shareThe Handy Astronomy Answer Book